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V15T16-CC200_Datasheet PDF

发帖时间:2021-06-15 01:35:19

Car production build up in CEE brings along test challenges

For the hydrogen storage, CEA-Liten said it has adopted a chemical compound named sodium boro-hydride (NaBH). NaBH, in the form of white powder, is stored in a small cartridge that also contains water. A chemical reaction, or hydrolysis, takes place by projecting the liquid on the powder. The hydrogen cartridge then offers a 500 Wh/l power-weight ratio.

The disposable hydrogen cartridge, noted CEA-Liten, offers a 500-Wh/kg energy density. The energy is available on demand via electronic control of the chemical reaction. We have developed a concept where we put inert chemical components in the tank. Hydrogen is transformed into electricity on the silicon chip and can recharge up to five times the cell phone battery.”

V15T16-CC200_Datasheet PDF

A cartridge that generates hydrogen on-demand. (Source: Artechnique/CEA)

The system produces water but in limited quantity. The water evaporates and is used to cool the system, notedFrédéric Gaillard, lab manager for micropower sources at CEA.

V15T16-CC200_Datasheet PDF

CEA-Liten claimed the micro fuel cell can provide up to 400-mW per square centimeter of silicon and generally stabilizes at 150 mW per square centimeter for several hundreds of hours. The team of researchers said it aims to reach, in about four years, 1 watt per square centimeter, which means only a few square centimeters of silicon will be necessary to supply a 3-to-5-watt mobile phone.

Our main concern is the cost of material. Today, we are already well above Li-ion batteries in terms of energy density, while we are still at the prototype stage,” said Marsacq.

V15T16-CC200_Datasheet PDF

Igor Bimbaud, manager of ST’s Energy sources business unit said that under the terms of the collaboration agreement signed with CEA-Liten in 2007, a 3500-square meter laboratory and production unit would be established by the end of 2008. This would pave the way towards industrialization of the hydrogen fuel cell.

In 2007, we presented a 1-watt demonstrator. We are now in the proof-of-concept phase,” said Bimbaud. At the end of 2009 or early 2010, our first products will hit the shelves in the form of an external accessory, either a charger or an add-on-battery extender. For the time being, we have designed a belt pouch containing the hydrogen cartridge and micro fuel cell.”

Analog designers are often as scarce as hen's teeth, so chip makers like Freescale Semconductor, in need of engineers who can link digital devices to the real world, are stepping up efforts to recruit analog and mixed-signal engineers.

You'll find more on the analog engineering issue as well as reports on new supermagnet” materials and dangerous buckyballs in this week slideshow.

For more on these subjects and other features, listen to technology correspondent R. Colin Johnson's weekly podcast.

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